/* ============================================
   J. Allan MacDonald - Author Site
   Aesthetic: Antiquarian Twilight
   ============================================ */

/* --- Color System with Light/Dark Mode --- */
:root {
  /* Light mode (default) */
  --color-bg: #faf6ef;
  --color-bg-elevated: #ffffff;
  --color-bg-subtle: #f0ebe0;
  --color-text: #2a2623;
  --color-text-muted: #5c5652;
  --color-accent: #8b3a3a;
  --color-accent-hover: #6b2a2a;
  --color-gold: #b5935a;
  --color-gold-soft: rgba(181, 147, 90, 0.15);
  --color-border: rgba(42, 38, 35, 0.12);
  --color-border-strong: rgba(42, 38, 35, 0.22);
  --color-shadow: rgba(42, 38, 35, 0.08);
  --color-shadow-strong: rgba(42, 38, 35, 0.16);
  --color-glow: rgba(181, 147, 90, 0.4);
  --color-overlay: rgba(250, 246, 239, 0.92);

  /* Typography */
  --font-display: 'Playfair Display', 'Georgia', serif;
  --font-body: 'Crimson Pro', 'Times New Roman', serif;
  --font-ui: 'DM Sans', 'Helvetica Neue', sans-serif;

  /* Spacing & Sizing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --max-width: 1100px;
  --content-width: 720px;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #151518;
    --color-bg-elevated: #1e1e22;
    --color-bg-subtle: #0f0f11;
    --color-text: #e8e0d5;
    --color-text-muted: #9a918a;
    --color-accent: #d4a855;
    --color-accent-hover: #e8bc6a;
    --color-gold: #d4a855;
    --color-gold-soft: rgba(212, 168, 85, 0.12);
    --color-border: rgba(232, 224, 213, 0.08);
    --color-border-strong: rgba(232, 224, 213, 0.16);
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-strong: rgba(0, 0, 0, 0.5);
    --color-glow: rgba(212, 168, 85, 0.35);
    --color-overlay: rgba(21, 21, 24, 0.94);
  }
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 18px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Subtle grain texture overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  z-index: 9999;
}

@media (prefers-color-scheme: dark) {
  body::before {
    opacity: 0.04;
  }
}

/* Ambient glow effect */
body::after {
  content: '';
  position: fixed;
  top: -50%;
  left: 50%;
  width: 100vw;
  height: 100vh;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, var(--color-glow), transparent 60%);
  pointer-events: none;
  opacity: 0.4;
  z-index: -1;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.2rem, 4vw + 1rem, 3.2rem);
  margin-bottom: var(--space-md);
}

h2 {
  font-size: clamp(1.6rem, 2vw + 0.8rem, 2rem);
  margin-bottom: var(--space-sm);
}

h3 {
  font-size: 1.3rem;
  margin-bottom: var(--space-xs);
}

p {
  margin-bottom: var(--space-sm);
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-accent-hover);
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

strong {
  font-weight: 600;
}

em {
  font-style: italic;
}

/* --- Layout --- */
.site-wrapper {
  width: min(var(--max-width), 92vw);
  margin: 0 auto;
}

main {
  flex: 1;
  width: min(var(--max-width), 92vw);
  margin: 0 auto;
  padding: var(--space-xl) 0 var(--space-2xl);
}

/* --- Header --- */
.site-header {
  width: min(var(--max-width), 92vw);
  margin: var(--space-lg) auto var(--space-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  text-align: center;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  text-decoration: none;
  color: inherit;
}

.brand:hover .brand-title {
  color: var(--color-accent);
}

.brand:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 8px;
  border-radius: var(--radius-sm);
}

.brand-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw + 0.5rem, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

.brand-tag {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.25em;
}

.site-nav {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
  justify-content: center;
}

.nav-link {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: var(--space-xs) 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.nav-link.active {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* --- Hero Section --- */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  margin-bottom: var(--space-2xl);
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.eyebrow {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.3em;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw + 1rem, 3.6rem);
  line-height: 1.1;
  margin-bottom: 0;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.hero-description {
  font-size: 1.05rem;
  max-width: 48ch;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* --- Book Card --- */
.book-card {
  position: relative;
  perspective: 1200px;
}

.book-cover {
  position: relative;
  max-width: 320px;
  transform-style: preserve-3d;
  transform: rotateY(-8deg);
  transition: transform 0.4s ease;
}

.book-cover:hover {
  transform: rotateY(-2deg) translateY(-8px);
}

.book-cover img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  box-shadow:
    0 25px 50px -12px var(--color-shadow-strong),
    0 12px 24px -8px var(--color-shadow),
    -20px 0 40px -20px var(--color-shadow);
  transition: box-shadow 0.4s ease;
}

.book-cover:hover img {
  box-shadow:
    0 35px 60px -15px var(--color-shadow-strong),
    0 18px 30px -10px var(--color-shadow),
    -25px 0 50px -25px var(--color-shadow),
    0 0 60px -10px var(--color-glow);
}

/* Decorative book spine effect */
.book-cover::before {
  content: '';
  position: absolute;
  left: 0;
  top: 3%;
  bottom: 3%;
  width: 12px;
  background: linear-gradient(
    90deg,
    rgba(0, 0, 0, 0.25) 0%,
    rgba(0, 0, 0, 0.1) 40%,
    transparent 100%
  );
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  transform: translateX(-2px);
}

/* --- Buttons --- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.9rem 1.8rem;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
}

.button-primary {
  background: var(--color-accent);
  color: var(--color-bg);
  box-shadow: 0 8px 24px -4px var(--color-shadow-strong);
}

.button-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -4px var(--color-shadow-strong);
  color: var(--color-bg);
}

.button-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
}

.button-ghost:hover {
  background: var(--color-gold-soft);
  border-color: var(--color-gold);
  color: var(--color-text);
}

.cta-row {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* --- Cards --- */
.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: 0 8px 32px -8px var(--color-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px -12px var(--color-shadow-strong);
}

/* --- Section Styles --- */
.section {
  margin-bottom: var(--space-2xl);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-title {
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}

/* --- About Section --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-xl);
  align-items: start;
}

.about-sidebar {
  position: sticky;
  top: var(--space-lg);
}

.about-portrait {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: var(--color-bg-subtle);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-family: var(--font-ui);
  font-size: 0.85rem;
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.about-intro {
  font-size: 1.15rem;
  line-height: 1.8;
}

.about-section h3 {
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.link-list a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.link-list a::before {
  content: '→';
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.link-list a:hover::before {
  opacity: 1;
  transform: translateX(0);
}

/* --- Blurb/Quote Block --- */
.blurb {
  background: var(--color-gold-soft);
  border-left: 3px solid var(--color-gold);
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  font-size: 1.1rem;
}

/* --- Posts Grid --- */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.post-card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: 0 8px 32px -8px var(--color-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  text-decoration: none;
  color: inherit;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px -12px var(--color-shadow-strong);
}

.post-date {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

.post-title {
  font-size: 1.3rem;
  margin-bottom: 0;
}

.post-excerpt {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* --- Footer --- */
.site-footer {
  width: min(var(--max-width), 92vw);
  margin: 0 auto;
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-md);
}

.footer-links a {
  color: var(--color-text-muted);
}

.footer-links a:hover {
  color: var(--color-accent);
}

/* --- Animations --- */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  animation: fadeUp 0.7s ease forwards;
  animation-delay: var(--delay, 0s);
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    text-align: center;
  }

  .hero-content {
    order: 2;
    align-items: center;
  }

  .hero-visual {
    order: 1;
  }

  .hero-description {
    max-width: 100%;
  }

  .book-cover {
    max-width: 260px;
    transform: rotateY(0);
  }

  .book-cover:hover {
    transform: translateY(-8px);
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .about-sidebar {
    position: static;
    max-width: 280px;
    margin: 0 auto;
  }
}

@media (max-width: 600px) {
  html {
    font-size: 16px;
  }

  .site-header {
    margin: var(--space-md) auto var(--space-lg);
  }

  .site-nav {
    gap: var(--space-md);
  }

  main {
    padding: var(--space-lg) 0 var(--space-xl);
  }

  .book-cover {
    max-width: 220px;
  }

  .cta-row {
    flex-direction: column;
    width: 100%;
  }

  .button {
    width: 100%;
    justify-content: center;
  }

  .site-footer {
    flex-direction: column;
    text-align: center;
  }
}

/* --- Utility Classes --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center {
  text-align: center;
}

.text-muted {
  color: var(--color-text-muted);
}

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }